decrescence

noun
de·​cres·​cence | \ də̇ˈkresən(t)s, dēˈ-\
plural -s

Definition of decrescence

: the act or process of decreasing specifically : decrement sense 1b

History and Etymology for decrescence

Latin decrescentia, from decrescent-, decrescens (present participle of decrescere to decrease) + -ia -y

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